Java Tutorial/J2ME/RadioButton

RadioButton with ChoiceGroup

   <source lang="java">

import javax.microedition.lcdui.Choice; import javax.microedition.lcdui.ChoiceGroup; import javax.microedition.lcdui.rumand; import javax.microedition.lcdui.rumandListener; import javax.microedition.lcdui.Display; import javax.microedition.lcdui.Displayable; import javax.microedition.lcdui.Form; import javax.microedition.lcdui.StringItem; import javax.microedition.midlet.MIDlet; public class J2MERadioButtons1 extends MIDlet implements CommandListener {

 private Display display;
 private Form form = new Form("Gender");
 private Command exit = new Command("Exit", Command.EXIT, 1);
 private Command process = new Command("Process", Command.SCREEN, 2);
 private ChoiceGroup gender = new ChoiceGroup("Enter Gender", Choice.EXCLUSIVE);
 private int currentIndex;
 private int genderIndex;
 public J2MERadioButtons1() {
   display = Display.getDisplay(this);
   gender.append("Female", null);
   currentIndex = gender.append("Male ", null);
   gender.setSelectedIndex(currentIndex, true);
   genderIndex = form.append(gender);
   form.addCommand(exit);
   form.addCommand(process);
   form.setCommandListener(this);
 }
 public void startApp() {
   display.setCurrent(form);
 }
 public void pauseApp() {
 }
 public void destroyApp(boolean unconditional) {
 }
 public void commandAction(Command command, Displayable displayable) {
   if (command == exit) {
     destroyApp(false);
     notifyDestroyed();
   } else if (command == process) {
     currentIndex = gender.getSelectedIndex();
     StringItem message = new StringItem("Gender: ", gender.getString(currentIndex));
     form.append(message);
     form.delete(genderIndex);
     form.removeCommand(process);
   }
 }

}</source>